As of 1 June 2002, the access from fixed telephones changed according to
the carrier serving the cellular number:

Comcel/Occel and Celcaribe: now dial 03 + 310 + 7-digit mobile number

Bellsouth: now dial 03 + 315 + 7-digit mobile number

From cellular phones, domestic access to other cellular numbers is
by dialling 310 + 7-digit mobile number to reach Comcel/Occel and Celcaribe
cellular numbers, and 315 + 7-digit mobile number to reach Bellsouth
cellular numbers.

Numbering format changes from outside Colombia was unclear, but the
change suggests that if cellular mobile numbers were dialled as
+57 33 xxxxxxx, the dialling becomes +57 3 310 xxxxxxx or +57 3 315 xxxxxxx
according to the called number's mobile carrier.

No information was apparent regarding any permissive dialling period,
although the migration to the new cellular numbering appears to allows
for permissive use of old and new formats.

Freephone service access also changed. The previous format of
dialling 9800 + 6-digit freephone number has changed to
01 + 800 + 7-digit freephone number within Colombia. The new
7-digit freephone number is formed by prepending digit '0' to
the former 6-digit freephone number. For example, 9800 + 123456
becomes 01 800 0123456.

Internet service numbers change from 947 + 7-digit Internet service
number to 01 + 947 + 7-digit Internet service number.

There was also no information regarding permissive dialling period
for the freephone, premium and Internet numbering, nor could it be
determined whether such numbers are accessible from outside Colombia.